Abstract
One of the most common problems of medical practice today is that of digitalis intoxication, which is seen in 20 to 25 per cent of patients who are given the drug.1 One need only survey a hospital census to discover that on the usual adult general medical service, about 20 per cent of patients are receiving digitalis in some form, usually digoxin, the fourth most frequently prescribed drug by physicians in 1970. The symptoms of digitalis toxicity are often multiple and confusing, and clinical signs are sometimes misleading. The search for a more objective means for the diagnosis of "too . . .